Many of us at Merck Animal Health are pet owners. The science of healthier animals drives everything we do – helping to ensure the safety and well-being of your pet is our top priority.

We know how important it is to make sure you have accurate information about our products in order to feel comfortable and confident about the medications you are giving to your pet. We encourage you to speak with your veterinarian to discuss what's best for you. This site is dedicated to giving you the facts about BRAVECTO®, our flea and tick medication.

Get the Facts


BRAVECTO® Facts

BRAVECTO® is the first and only oral treatment that has been shown to quickly and effectively kill fleas and multiple tick species for up to 12 weeks* after a single dose.1
Most other flea and tick medications only last for up to four weeks after a single dose. Protecting against fleas and ticks is a must to ensure health and quality of life for your pets.


All of our drugs — including BRAVECTO® — go through a rigorous regulatory approval process.
In fact, it is approved in 72 countries around the world. Regulatory agencies have reviewed the BRAVECTO® research data and have determined that it is safe and approved for use in their countries when used according to the product label.


BRAVECTO® is safe to use with other medications.
In a recent field study, BRAVECTO® was used at the same time with other medications, such as vaccines, heartworm preventives, antibiotics and steroids. No adverse reactions were observed.1


BRAVECTO® does not cause cancer.
Clinical research data and our analysis of adverse events do not show a causal relationship between BRAVECTO® and liver or kidney issues or cancer.


BRAVECTO® is approved by the U.S. FDA for use in breeding, pregnant and lactating dogs.
Many other flea and tick medications are not approved for this use. This reinforces the safety profile of BRAVECTO®.


As required by law, adverse events involving BRAVECTO® are reported to regulatory agencies.
All adverse events must be reported to the governing regulatory agency — even if no causal relationship is suspected. A report does not mean the product caused the adverse reaction.
 

Merck Animal Health Facts

Our top priority is the health of your pet.
In fact, our employees share the common goal of working together to ensure your pets are there to comfort you and be an important part of families for years to come.


We are serious about improving the health of animals around the world.
This is why we are committed to investing in the research, development and manufacturing of some of the most innovative veterinary medicines in the world. We are committed to improving the lives of animals in more than 150 countries and counting.


Our company is driven by simple core values.
We strive to be visionary, collaborative, dynamic and responsible. Whether working with veterinarians or their patients around the world, healthy pets mean happy families.


Since our early days, we have grown to become a leader whose work in animal health is unparalleled.
For more than 60 years, vaccines that protect pets from dangerous diseases, medicines to treat chronic diseases and effective parasite controls have been part of our mission to protect the health and well-being of pets.


We continue to develop innovative solutions to find new and better ways to keep pets safe and healthy.
At Merck Animal Health, our veterinarians, scientists and industry experts work together in teams centered around entire diseases affecting pets, not just single products.


Involved in global initiatives
In addition to all the great work our employees are doing to support you and your veterinarian, Merck Animal Health is involved with global initiatives such as Afya and Mission Rabies – both organizations working in Africa and India to eradicate the globe of rabies in the next 15 years.

Setting the Record Straight


We know that protecting your pet's health can be emotional. After all, many of us at Merck Animal Health have our own fur babies who are true members of our families. However, don't let hearsay, conjecture and opinion be a substitute for truth — get the facts and discuss your questions with your trusted veterinary professional.

It’s easy to find all sorts of information about veterinary medicines across the internet — especially on social media. Unfortunately, much of the information shared on social media is simply inaccurate. You deserve the facts — the complete facts — on BRAVECTO®. If you would like more information please consult a trusted veterinary professional, or visit us.bravecto.com.

Myth

BRAVECTO® CAUSES SERIOUS HEALTH ISSUES – INCLUDING CANCER, ORGAN FAILURE AND SEIZURES.

Fact

Clinical research data and analysis of adverse events to date do not demonstrate a causal relationship between BRAVECTO® and liver or kidney issues or cancer.

Further, the most common reported events are mild and transient gastrointestinal upset, such as vomiting or diarrhea, and these are noted on the product label.

Myth

BRAVECTO® DOESN'T WORK

Fact

More than 55 clinical trials prove that BRAVECTO® is safe and effective against the most common fleas and ticks. It works quickly too, killing these parasites within hours.

Myth

SIDE EFFECTS FROM TAKING BRAVECTO® CAN SHOW UP LONG AFTER THE DOSE

Fact

Following the approval of an animal health drug, companies are required to continue monitoring the drug to ensure the safety and efficacy through an objective, science-based lens. Throughout the monitoring process, we report adverse effects to the appropriate governing body as required by law. This monitoring and scientific assessment continue to support BRAVECTO® safety. Since BRAVECTO® was approved in 2014, more than 60 million doses have been distributed around the world, which reflects the trust and confidence of both pet owners and vets. There is no question in our confidence in the safety and efficacy profile of BRAVECTO®.

Myth

NEGATIVE INCIDENTS USING BRAVECTO® ARE INCREASING

Fact

This is simply not the case. Based on the most recent Periodic Safety Update Report (PSUR), which was assessed by the European Medicines Agency (the EU equivalent to the FDA), the incidence of all adverse events remains categorized as “rare.” That means adverse events are occurring in between 1/10,000 (0.01%) and 1/1,000 (0.1%). The most common reported events are mild and transient gastrointestinal upset, which are noted on the product label. An adverse event report also does not mean causation.

In today’s digital age, social media can present a misleading picture. We recommend you consult your veterinarian to gain the fullest, most accurate picture of your pet’s health and ask them about BRAVECTO®.

Myth

HOLISTIC MEDICINE PROVIDES A MORE EFFECTIVE ALTERNATIVE TO FLEA AND TICK MEDICATION

Fact

Fleas and ticks are not just a nuisance, they also pose significant health risks, as they can transmit diseases (including Lyme disease, Rocky Mountain Spotted Fever, Bartonellosis and others).

Alternative methods for treating fleas and ticks are available. However, unlike holistic treatments, BRAVECTO® has undergone the stringent testing and trials needed for regulatory approvals, and is monitored by regulatory agencies across the globe.

Contact Us


For any questions or concerns please contact the Merck Animal Health Companion Animal Technical Services and Pharmacovigilance Team:

800-224-5318 ~ 8:30 a.m. to 5 p.m. EST

1 All data on file. Merck Animal Health.

* BRAVECTO® kills fleas and prevents flea infestations. BRAVECTO® Chew kills ticks (black-legged tick, American dog tick, and brown dog tick) for 12 weeks and also kills lone star ticks for 8 weeks.

IMPORTANT SAFETY INFORMATION:
The most common adverse reactions recorded in clinical trials were vomiting, decreased appetite, diarrhea, lethargy, polydipsia, and flatulence. BRAVECTO® has not been shown to be effective for 12-weeks' duration in puppies less than 6 months of age. BRAVECTO® is not effective against lone star ticks beyond 8 weeks after dosing.